26246001640 has 32 divisors (see below), whose sum is σ = 59283307080. Its totient is φ = 10457546752.

The previous prime is 26246001601. The next prime is 26246001641. The reversal of 26246001640 is 4610064262.

It can be written as a sum of positive squares in 4 ways, for example, as 24919148164 + 1326853476 = 157858^2 + 36426^2 .

It is not an unprimeable number, because it can be changed into a prime (26246001641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266277 + ... + 1286836.

Almost surely, 2^26246001640 is an apocalyptic number.

26246001640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26246001640 is an abundant number, since it is smaller than the sum of its proper divisors (33037305440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26246001640 is a wasteful number, since it uses less digits than its factorization.

26246001640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553381 (or 2553377 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 26246001640 in words is "twenty-six billion, two hundred forty-six million, one thousand, six hundred forty".